A bit better known than the nearby Netherton, I believe this RSC has been excavated by the estimable Mr Burl.
On a raised platform and ringed by trees. From memory, I think it has been restored.
It’s well worth a visit, though I was unable to enter the field on my visits (seperated by only a couple of days). Bullocks. A lot of bullocks.
AND I had my dog with me! Nuff said.